Example:

Category Factory. Code. Date delivered

Column F1 CC 01 Jan 1, 2012
Column F1 CC 02 Feb 2, 2012
Beam F3 BM 01 Jan 3, 2012
Column F1 CC 01 Jan 1, 2012


Question:

How many delivered column in factory 1 for the month of january?

Any help from everybody?